GENERAL DESCRIPTION
Key features of the ALD2321A/ALD2321B/ALD2321 include very high input impedance, very low offset voltage utilizing on-chip e-trim (EPAD® electronic-trimming) technology, flexible multiple output configurations and fast response time with small overdrive voltage. For many applications the ALD2321A/ALD2321B/ALD2321 can eliminate an input amplification stage, a precision input bias stage, a signal level shift stage and an output buffer stage, and do the entire job from low level input signal detection to high output driver -- all on a single chip. The input voltage includes ground, making this voltage comparator ideal for single supply (+5V) or dual supply (± 5V) powered systems. For dual supply applications, GND pin is connected to the most negative supply instead of Ground (0.0V). The negative supply voltage can be at any value between 0.0V and -5V. Each voltage comparator is individually trimmed at the factory for minimum offset voltage at ground voltage potential, making the ALD2321A/ ALD2321B/ALD2321 at its best offset voltage and ready to compare very low signal level voltages at or near ground potential.
Advanced Linear Devices
